No, he did not. He was exposed, but it was unknown initially if he had actually contracted it. After monitoring they determined he hadn't.

There were numerous influencers in the decision to care for Bentley.  The risk to the public was felt to be minimal.  While Bentley is the first Ebola exposed dog in the U.S., there have been no reports of dogs becoming ill from Ebola or of being implicated in the transmission to humans. Nonetheless, because of the nature of the virus, Bentley was managed with an abundance of caution. There was much to be learned from Bentley during his post exposure period.  Would he shed the virus or not?  Under tightly controlled isolation conditions, he was carefully monitored.  Finally, the human animal bond is a powerful phenomenon. Assurance that Bentley was receiving excellent care would help Nina Pham by providing much needed encouragement for her own recovery.  Because it is well-known that people will put themselves at risk in the interest of animals, people exposed to Ebola should be more likely to self-report early, if they are sure they are not putting their animals at risk by doing so. https://vetmed.tamu.edu/news/press-releases/bentley-the-dog-monitored-for-ebola-returns-home/